JP6438586B2 - Electronic product metal shell with antenna groove, and electronic product metal shell manufacturing method - Google Patents

Description

[Cross-reference of related applications]
This application claims the priority and benefit of Chinese Patent Application No. 201410837112 filed December 26, 2014 to the National Intellectual Property Office (SIPO) of the People's Republic of China, The contents are incorporated herein by reference.

  The present invention relates to an electronic product manufacturing technique, and more particularly to an electronic product metal shell having an antenna groove and a method for manufacturing the same.

  Currently, to solve the signal shielding problem caused by the shell, electronic products such as metal mobile phones are HTC ONE with two upper and lower antenna slots, iPhone with side antenna slots ( In most cases, the slot method and the injection molding on the rear cover of the mobile phone are employed, such as (registered trademark) 5 / 5s. However, the method of creating and injection molding the antenna slot in the electronic product metal shell (for example, the rear cover of a metal mobile phone) described above causes damage to the entire structure of the electronic product metal shell, and the appearance of the electronic product metal shell is clean. And affect continuity. On the other hand, the visible plastic of the electronic product metal shell (eg, the rear cover of a metal mobile phone) also damages the metal texture of the entire electronic product metal shell.

  The present disclosure states that prior art methods of antenna slot creation and injection molding in an electronic product metal shell affect the cleanliness and continuity of the appearance of the electronic product metal shell and impair the metal texture of the entire electronic product metal shell. To solve the problem, and provide an electronic product metal shell having an antenna groove and a method of manufacturing the same. The antenna groove formed on the electronic product metal shell of the present disclosure is not visible to the naked eye, the surface layer of the external surface of the electronic product metal shell is not damaged, and the external surface of the aluminum shell is flat and clean. Maintains the cleanliness and continuity of the appearance of the product metal shell and does not impair the metal texture of the entire electronic product metal shell.

  In order to achieve the aforementioned object, a first aspect of the present disclosure provides an electronic product metal shell having an antenna groove. The electronic product metal shell has a metal layer and a hard anodized layer, the hard anodized layer is covered on a surface of the metal layer, and a step is on the first surface of the electronic product metal shell. And forming the step, wherein the step passes through the hard anodized layer covered with the first surface of the metal layer in the thickness direction of the metal shell of the electronic product, and a part of the metal layer, and the antenna groove Disposed in the step, exposing the inside of the hard anodized layer covered on the second surface of the metal layer through the remaining portion of the metal layer in the thickness direction, and a non-conductive material Fills the antenna groove.

A second aspect of the present disclosure provides a method for manufacturing an electronic product metal shell having an antenna groove. The method comprises (1) subjecting the metal layer to a hard anodizing treatment and an ink spraying treatment in order to form a hard anodized layer and an ink layer, respectively, and (2) a first product obtained after step (1). forming a step on the surface, the antenna groove formed in said step, said step is covered in the thickness direction before Symbol products obtained after step (1) to the first surface of the metal layer The hard anodic oxide layer and a part of the metal layer are penetrated, and the antenna groove is covered on the second surface of the metal layer through the remaining part of the metal layer in the thickness direction. wherein exposing the inside of the hard anodic oxide layer has a (3) step of step (2) the obtained products the ink layer is removed in the after, filling non-conductive material to the antenna groove.

  An embodiment of the second aspect of the present disclosure provides an electronic product metal shell. The electronic product metal shell is obtained by the method described above.

  The antenna groove formed on the electronic product metal shell of the present disclosure is not visible to the naked eye, the surface layer of the external surface of the electronic product metal shell is not damaged, and the external surface of the aluminum shell is flat and clean. Maintains the cleanliness and continuity of the appearance of the product metal shell and does not impair the metal texture of the entire electronic product metal shell.

  These aspects and advantages of the embodiments of the present disclosure will be described in detail with reference to the following detailed description.

Schematic diagram of a cross-sectional structure of an aluminum shell after removing an ink layer and a hard anodized layer corresponding to the step pattern of Example 1 of the present disclosure Schematic cross-sectional structure of an aluminum shell after removing a portion of the aluminum layer to obtain the steps of Example 1 of the present disclosure Radial engraving of the aluminum groove slit of Example 1 of the present disclosure, and a schematic cross-sectional structure of the aluminum shell after removing the ink layer corresponding to the antenna groove slit Schematic cross-sectional structure of an aluminum shell after removing the ink layer of Example 1 of the present disclosure Schematic cross-sectional structure of an aluminum shell after forming the ink layer of Example 1 of the present disclosure The figure of the aluminum shell after carrying out the radium engraving of the step pattern of Example 1 of this indication Illustration of the aluminum shell after etching the steps of Example 1 of the present disclosure The figure of the aluminum shell after carrying out the radium engraving of the antenna groove slit of Example 1 of this indication

  Examples of the present disclosure will be described in detail. The described embodiments are illustrative and illustrative in order to provide an overall understanding of the present disclosure. The examples do not limit the present disclosure.

  In a first aspect of an embodiment of the present disclosure, an electronic product metal shell is provided, the electronic product metal shell having a metal layer 3 and a hard anodized layer 1. The hard anodized layer 1 is covered with a metal layer surface. Step 4 is formed on the first surface of the electronic product metal shell. The step penetrates a part of the hard anodized layer and the metal layer covered with the first surface of the metal layer in the thickness direction of the electronic product metal shell. The antenna groove 5 is disposed in the step, penetrates the remaining portion of the metal layer in the thickness direction, and exposes the inside of the hard anodized layer covered with the second surface of the metal layer. The non-conductive material is filled in the antenna groove.

  In an embodiment of the present disclosure, Step 4 has a recess having a width of about 1.0 to 5.0 cm and a depth of about 0.1 to 0.8 mm. For example, in one embodiment, the depth of the recess is about 0.3 to 0.5 mm.

  In the embodiment of the present disclosure, the opening of the antenna groove 5 facing the first surface of the electronic product metal shell is defined as an upper opening, and the antenna groove 5 has a trapezoidal cross-sectional structure in which the upper opening is larger than the lower opening of the antenna groove. Have. The upper opening has a width of about 2 to 5 mm, for example about 2 mm to 5 mm, and the lower opening has a width of about 0.8 to 1.4 mm, for example about 0.8 to 1.2 mm.

  In an embodiment of the present disclosure, the thickness of the metal layer 3 is about 0.5 to 1.5 mm, such as about 0.5 to 0.6 mm, and the thickness of the hard anodized layer 1 is about 0.02 to 0. 0.06 mm, for example, about 0.04 to 0.06 mm.

  In the embodiment of the present disclosure, the metal layer 3 includes an aluminum alloy layer.

  In embodiments of the present disclosure, the electronic product metal shell includes a mobile phone metal shell or a tablet computer metal shell.

  In a second aspect of an embodiment of the present disclosure, a method for manufacturing an electronic product metal shell with an antenna groove is provided. The manufacturing method of the electronic product metal shell provided with the antenna groove includes the following steps.

  In step (1), a hard anodizing process and an ink spraying process are sequentially performed on the metal layer to form a hard anodized layer and an ink layer, respectively.

  In step (2), a step is formed on the first surface of the first product obtained in step (1), and an antenna groove is formed in the step. The step passes through a portion of the hard anodized layer and the metal layer that is covered on the first surface of the metal layer in the thickness direction of the first product. The antenna groove penetrates the remaining portion of the metal layer in the thickness direction, and exposes the inside of the hard anodized layer covered on the second surface of the metal layer.

  In step (3), after step (2), the ink layer of the second product is removed, and the antenna groove is filled with a non-conductive material.

  In the embodiment of the present disclosure, there is no particular limitation on the process of the hard anodizing treatment, and the hard anodizing treatment is commonly used in the technical field. In the embodiment, the hard anodizing treatment in step (1) is performed by sequentially performing alkaline etching treatment, smut removal treatment, oxidation treatment and sealing treatment on the metal layer, and then performing alkaline etching treatment, smut removal treatment, oxidation treatment and sealing treatment. Wash after each. In the embodiment of the present disclosure, the cleaning method is not particularly limited, and is a cleaning method commonly used in the art, for example, two to three cleanings with deionized water.

  In the embodiments of the present disclosure, the conditions for the alkaline etching treatment are not particularly limited, and are technically commonly used in the alkaline etching treatment. For example, in an embodiment, the alkaline etching process comprises at least one selected from the group consisting of sodium hydroxide, potassium hydroxide, and lithium hydroxide at a temperature of about 50-70 ° C. for about 1-2 minutes. Including an etching solution having a concentration of about 30 to 60 g / L.

  In the embodiments of the present disclosure, there are no particular limitations on the conditions for the smut removal process, and technically commonly used conditions for the smut removal process. In the examples, the smut removal treatment is a smut removal solution having a nitric acid aqueous solution at a temperature of about 20 to 30 ° C. for about 1 to 3 minutes, and nitric acid has a content (concentration of about 130 to 270 g per liter of the smut removal solution. 65-68 wt% nitric acid is approximately equivalent to about 200-400 mL).

In the embodiment of the present disclosure, the conditions for the oxidation treatment are not particularly limited, and are conditions commonly used in the oxidation treatment technically. In the embodiment, the conditions of the oxidation treatment are about 30 to 50 minutes at a temperature of about 5 to 12 degrees Celsius, a duty ratio of about 50 to 90% with an impulse waveform of a regular square wave pulse, a frequency of about 500 to 1000 Hz, about 2 An oxidation solution having a current density of ˜7 Adm ² , an aqueous solution of sulfuric acid and oxalic acid / malic acid, and a sulfuric acid content of about 120 to 220 g and an oxalic acid or malic acid content of about 8 to 20 g per liter of the oxidation solution It is performed under the conditions of An oxidizing solution having an aqueous solution of sulfuric acid and oxalic acid / malic acid refers to a solution having sulfuric acid and oxalic acid, or a solution having sulfuric acid and malic acid.

  In the embodiments of the present disclosure, the conditions for the sealing process are not particularly limited, and are technically commonly used conditions for the sealing process. In the examples, the sealing process conditions are about 20-30 degrees Celsius for about 2-3 minutes. In an embodiment, the sealing material includes at least one selected from the group consisting of a nickel-free sealing material, a trace nickel sealing material, and a heavy metal-free sealing material. As can be conceived by those skilled in the art, the hard anodizing treatment is performed after the sealing treatment, and a hard anodized layer is formed upon drying after the washing treatment. The drying method is not particularly limited, and is a method commonly used in the art. For example, drying is performed with oil-free compressed gas at a temperature of about 20-30 degrees Celsius for about 5-10 minutes, which is well known to those skilled in the art and will not be described in detail.

  In the embodiment of the present disclosure, the ink layer 2 is formed on the first and second surfaces of the product obtained after the hard anodizing treatment.

  In the embodiment of the present disclosure, the ink spraying process is not particularly limited, and is an ink spraying process commonly used in the technical field. In an embodiment, the ink spraying process sprays UV ink to form an ink layer having a thickness of about 30 to 60 μm, is baked at about 110 to 120 ° C. for about 20 to 30 minutes, and is exposed to ultraviolet rays for about 1 to 2 minutes. .

  In embodiments of the present disclosure, those skilled in the art will appreciate that the second surface of the electronic product metal shell is the surface of the electronic product metal shell that is exposed to air when the electronic product metal shell is assembled with the finished electronic product. That is, the first surface is the surface of the metal shell of the electronic product opposite to the second surface.

  In the embodiment of the present disclosure, the step (2) is formed by forming a step pattern on the first surface of the first product obtained after step (1), and ink corresponding to the step pattern. The layer and the hard anodized layer are removed and part of the metal layer is removed in the thickness direction of the metal layer to obtain a step.

  In an embodiment of the present disclosure, in order to reduce breakage on the surface of the electronic product metal shell, it is ensured that no convex mark is formed on the second surface of the electronic product metal shell, further improving the robustness and hardness. In addition, the remaining part of the metal layer after removing a part of the metal layer has a thickness of about 20 to 80%, preferably about 20 to 40% of the total thickness of the metal layer.

  In an embodiment of the present disclosure, the formed step has a recess having a width of about 1.0-5.0 cm and a depth of about 0.1-0.8 mm. For example, the recess has a depth of about 0.3 to 0.5 mm.

  In an embodiment of the present disclosure, the step pattern is formed on the first surface of the first product obtained after step (1) by radium engraving. The radium engraving process is not particularly limited, and is a radium engraving commonly used technically. For example, since radium engraving is performed by a radium engraving machine known to those skilled in the art, detailed description is omitted.

  In the embodiment of the present disclosure, a part of the metal layer is removed in the thickness direction of the metal layer by etching. Etching conditions are not particularly limited, and are etching conditions commonly used in the art. Alternatively, the etching is performed with an acid etchant. The acid etching solution is not particularly limited, and is an acid etching solution commonly used in the art. For example, in the embodiments of the present disclosure, the acid etchant is an iron trichloride type acid etchant, a copper chloride type acid etchant, or a hydrochloric acid type acid etchant. The etching condition is an etching solution having an aqueous solution containing iron trichloride and hydrochloric acid at a temperature of about 20 to 30 ° C. for about 40 to 50 minutes. The etching solution has an iron trichloride content of about 800 per liter. ˜1000 g, and the content of hydrochloric acid is about 35 to 75 g (approximately equivalent to about 100 to 200 mL of hydrochloric acid having a concentration of about 36 to 38 wt%). As those skilled in the art can conceive, the etching time is related to the thickness of the metal layer that needs to be removed, and as the metal layer thickness that needs to be removed increases, the time required for etching also increases. Conversely, when the thickness of the metal layer that needs to be removed decreases, the time required for etching also decreases.

  In the embodiment of the present disclosure, the antenna groove in the step (2) is formed by spraying ink in a step shape, forming an antenna groove slit in the step, and removing the ink corresponding to the antenna groove slit. The metal layer corresponding to the groove slit is removed to expose the inside of the hard anodized layer covered on the second surface of the metal layer.

  In the embodiment of the present disclosure, in step (2), the ink spraying method is not particularly limited, and is an ink spraying method commonly used in the technical field. Further, in step (2), the ink is sprayed by spraying UV ink to form an ink layer having a thickness of about 30 to 60 μm, and baking at a temperature of about 110 to 120 ° C. for about 20 to 30 minutes. Expose to UV light for minutes.

  In the embodiment of the present disclosure, the antenna groove slit formed in step (2) has a width of about 0.02 to 0.1 mm.

  In the embodiment of the present disclosure, in step (2), the metal layer corresponding to the antenna groove slit is removed by etching, and the etching condition is about 20 to 50 ° C. for about 40 to 50 minutes. It has an aqueous solution containing iron trichloride and hydrochloric acid, and the content of iron trichloride is about 800 to 1000 g and the content of hydrochloric acid is about 35 to 75 g per liter of the etching solution.

  In embodiments of the present disclosure, the metal layer has other metal impurities such as copper and manganese. Therefore, in the embodiment of the present disclosure, the manufacturing method of the electronic product metal shell provided with the antenna groove further cleans after etching, peels off the black film after cleaning, removes the exposed black impurities, and cleans again. There is no particular limitation on the washing method, and it is a washing method commonly used in the art, for example, two to three washings with deionized water.

  In an embodiment of the present disclosure, an opening of the antenna groove corresponding to the first surface of the electronic product metal shell is defined as an upper opening, and the antenna groove has a trapezoidal cross-sectional structure in which the upper opening is larger than the lower opening of the antenna groove. . After removing a part of the metal layer, when the remaining part of the metal layer is about 20 to 80% of the total thickness of the metal layer, the width of the opening is about 2 to 5 mm, and the width of the lower opening Is about 0.8 to 1.4 mm. When the remaining portion of the metal layer is about 20-40% of the total thickness of the metal layer, the upper opening has a thickness of about 2-3 mm and the lower opening has a thickness of about 0.8-1 .2 mm.

  In the embodiments of the present disclosure, those skilled in the art will appreciate that the removed ink layer has an entire ink layer that is covered on the surface of the electronic product metal shell. The method for removing the ink layer is not particularly limited, and is a method commonly used technically as long as the ink layer can be removed. The ink layer may be removed with a neutral paint remover. The neutral paint remover is not particularly limited, and is a neutral paint remover commonly used in the art. For example, the neutral paint remover is a solvent type paint remover or a chlorinated hydrocarbon type paint remover. And at least one selected from the group consisting of water-soluble paint removers.

  As will be appreciated by those skilled in the art, in an embodiment of the present disclosure, the method for manufacturing an electronic product metal shell with an antenna groove further includes applying a second product after removing the ink layer and before filling with a non-conductive material. Wash and dry. The drying method is not particularly limited, and is a drying method commonly used in the art. For example, drying is performed under conditions having a temperature of about 80 to 120 degrees Celsius and a time of about 5 to 10 minutes. Moreover, there is no limitation in particular in the filling method of a nonelectroconductive material, and there is no limitation in particular in a nonelectroconductive material. The non-conductive material is at least one selected from the group consisting of a UV adhesive, a heat-curing adhesive, and a low-temperature curable adhesive.

  In an embodiment of the present disclosure, a non-conductive material is filled in the steps to beautify the appearance of the resulting electronic product metal shell.

  In the example of the present disclosure, the metal layer includes an aluminum alloy layer.

  In embodiments of the present disclosure, the electronic product metal shell includes a mobile phone metal shell or a tablet computer metal shell.

  According to a third aspect of the present disclosure, an electronic product metal shell obtained from the method described above is provided.

  Examples described below further illustrate the present disclosure. The examples do not limit the present disclosure.

  In the following examples, a 0.5 mm thick series 5 aluminum alloy is FUJIAN NANPING ALUMINUM CO. , Purchased from LTD. Nickel-free sealing material, trace nickel sealing material and heavy metal-free sealing material are available from SHENZHEN ODM TECHNOLOGY CO. , Purchased from LTD. The chlorinated hydrocarbon paint remover is DONGGUAN SIHUISURFACE PROCESSING TECHNOLOGY CO. , Purchased from LTD. The UV adhesive is purchased from Japan ASEC Company, and the UV adhesive is AS-210604C. Radium engraving machine is SHENZHEN GDLASER TECHNOLOGY CO. , LTD, the radium engraving machine is FM20D.

  This example describes an aluminum shell having a telephone antenna groove and a method of manufacturing the aluminum shell of the present disclosure.

  In the alkaline etching treatment in step (1), the series 5 aluminum layer 3 having a thickness of 0.5 mm is cut to form an aluminum plate having a size of 5 × 3.5 cm. Then, the aluminum plate is subjected to an alkaline etching treatment with a sodium hydroxide solution having a concentration of 40 g / L at 60 ° C. for 1.5 minutes, and the aluminum plate is washed twice with deionized water.

  In step (2), the smut removal treatment is performed on the aluminum plate obtained in step (1) at 25 ° C. for 2 minutes and with a smut removal solution (300 mL of concentrated nitric acid having a concentration of 65 wt% per liter of the smut removal solution). The aluminum plate is washed twice with deionized water.

In the oxidation treatment in step (3), the aluminum plate obtained in step (2) is placed in an oxidation tank and hard oxidation treatment is performed. The hard oxidation treatment was carried out for 40 minutes with a square wave pulse at 10 ° C., a duty ratio of 50%, a frequency of 800 Hz and a current density of 2 A / dm ² (the content of 98 wt% sulfuric acid per liter of the oxidation solution was 200 g, The aluminum plate is washed twice with deionized water.

  In step (4), the aluminum plate obtained in step (3) was sealed with a nickel-free sealant at 25 ° C. for 2.5 minutes, and the aluminum plate was washed twice with deionized water. Then, the aluminum plate is dried with an oil-free compressed gas at 25 ° C. to obtain a hard anodized layer 1 having a thickness of 35 μm.

  In the ink spraying process in step (5), UV ink is sprayed on the surface of the aluminum plate obtained in step (4) to form an ink layer 2 having a thickness of 50 μm, and the aluminum plate is baked at 115 ° C. for 25 minutes. , Exposed to UV light for 1.5 minutes.

  In step (6), the radium engraving is performed on the first surface of the aluminum plate obtained in step (5) by a radium engraving machine to remove the ink layer and the hard anodized layer corresponding to the step pattern. Then, the aluminum plate was etched with an etching solution (the content of iron trichloride hexahydrate was 900 g, the content of 37 wt% hydrochloric acid was 150 mL, and the others were water) at 25 degrees Celsius for 45 minutes. Step 4 having a width of 2.5 cm and a depth of 0.3 mm is obtained by removing a portion (0.3 mm) of the aluminum layer in the thickness direction of the aluminum plate. Then, the aluminum plate is washed twice with deionized water, the exposed black impurity layer is peeled off, and the aluminum plate is washed twice again with deionized water.

  In step (7), UV ink is sprayed onto the step to form an ink layer having a thickness of 40 μm, and the aluminum plate is baked at 115 ° C. for 25 minutes and exposed to ultraviolet rays for 1.5 minutes. Then, the antenna groove slit having a width of 0.06 mm is engraved with radium in the step to remove the ink layer corresponding to the antenna groove slit, and the aluminum layer corresponding to the aluminum groove slit is etched at 25 ° C. for 35 minutes with an etching solution (etching). Etching is performed with 1 liter of iron trichloride hexahydrate content of 900 g, 37 wt% hydrochloric acid content of 150 mL, and the remainder water. By observation, the inside of the hard anodized layer covered on the second surface of the aluminum plate is exposed. Then, the aluminum plate is washed twice with deionized water, the exposed black impurity layer is peeled off, and the aluminum plate is washed twice again with deionized water. An antenna groove having a trapezoidal cross-sectional structure in which the upper opening is larger than the lower opening of the antenna groove is obtained. The width of the upper opening is 3 mm and the width of the lower opening is 1.2 mm.

  In step (8), the ink layer on the rear surface of the aluminum plate is removed with a chlorinated hydrocarbon solvent paint remover, the aluminum plate is washed twice with deionized water, and baked at 100 ° C. for 7 minutes.

  Step (9) fills the antenna groove with UV adhesive.

  In this example, the cross-sectional structure schematic diagram of the aluminum shell after removing the ink layer and the hard anodized layer corresponding to the step pattern is shown in FIG. 1, and after removing a part of the aluminum layer to obtain the step FIG. 2 is a schematic cross-sectional view of the aluminum shell. FIG. 3 is a schematic cross-sectional view of the aluminum shell after the aluminum groove slit is engraved with radium and the ink layer corresponding to the antenna groove slit is removed. FIG. 4 shows a schematic cross-sectional structure of the aluminum shell after the removal, FIG. 5 shows a schematic cross-sectional structure of the aluminum shell after the ink layer is formed, and a diagram of the aluminum shell after the radium engraving of the step pattern. FIG. 7 shows a view of the aluminum shell after etching the step shown in FIG. Figure aluminum shell after the door has been radium engraved shown in Fig.

  The antenna groove formed on the aluminum shell according to this embodiment is not visible to the naked eye, does not impair the surface layer of the outer surface of the aluminum shell, and the outer surface of the aluminum shell is flat and beautiful. Maintains the cleanliness and continuity of the appearance of the phone and does not impair the metal texture of the entire phone body.

  This example describes an aluminum shell having a telephone antenna groove and a method of manufacturing the aluminum shell of the present disclosure.

  In the alkaline etching treatment in step (1), the series 5 aluminum layer 3 having a thickness of 0.5 mm is cut to form an aluminum plate having a size of 5 × 3.5 cm. Then, the aluminum plate is subjected to an alkaline etching treatment with a potassium hydroxide solution having a concentration of 30 g / L at 50 ° C. for 2 minutes, and the aluminum plate is washed twice with deionized water.

  In step (2), the smut removal treatment is performed on the aluminum plate obtained in step (1) at 20 ° C. for 1 minute, and with the smut removal solution (400 mL of concentrated nitric acid having a concentration of 65 wt% per liter of the smut removal solution). The aluminum plate is washed twice with deionized water.

In the oxidation treatment in step (3), the aluminum plate obtained in step (2) is placed in an oxidation tank and hard oxidation treatment is performed. The hard oxidation treatment was performed with a regular square wave pulse at a temperature of 5 ° C., a duty ratio of 50%, a frequency of 500 Hz, and a current density of 2 A / dm ² for 50 minutes (the content of 98 wt% sulfuric acid per liter of the oxidation solution was 220 g, The aluminum plate is washed twice with deionized water.

  In the sealing treatment of step (4), the aluminum plate obtained in step (3) is sealed with a trace amount of nickel sealing material at 20 ° C. for 3 minutes, and the aluminum plate is washed twice with deionized water. The plate is dried with an oil-free compressed gas at 25 ° C. to obtain a hard anodized layer 1 having a thickness of 40 μm.

  In the ink spraying process of step (5), UV ink is sprayed onto the surface of the aluminum plate obtained in step (4) to form an ink layer 2 having a thickness of 40 μm, and the aluminum plate is baked at 110 ° C. for 30 minutes. Expose to ultraviolet light for 1 minute.

  In step (6), the radium engraving is performed on the first surface of the aluminum plate obtained in step (5) by a radium engraving machine to remove the ink layer and the hard anodized layer corresponding to the step pattern. Then, the aluminum plate was etched at 20 ° C. for 50 minutes with an etching solution (for 1 L of etching solution, the content of iron trichloride hexahydrate is 800 g, the content of 37 wt% hydrochloric acid is 100 mL, and the other is water). Step 4 having a width of 2.5 cm and a depth of 0.4 mm is obtained by removing a portion (0.4 mm) of the aluminum layer in the thickness direction of the aluminum plate. Then, the aluminum plate is washed twice with deionized water, the exposed black impurity layer is peeled off, and the aluminum plate is washed twice again with deionized water.

  In step (7), UV ink is sprayed onto the step to form an ink layer having a thickness of 30 μm, and the aluminum plate is baked at 110 ° C. for 30 minutes and exposed to ultraviolet rays for 1 minute. Then, the antenna groove slit having a width of 0.02 mm is engraved with radium in the step to remove the ink layer corresponding to the antenna groove slit, and the aluminum layer corresponding to the aluminum groove slit is etched at 20 ° C. for 35 minutes with an etching solution (etching). Etching is performed with 1 liter of iron trichloride hexahydrate content of 800 g, 37 wt% hydrochloric acid content of 100 mL, and the remainder water. By observation, the inside of the hard anodized layer covered on the second surface of the aluminum plate is exposed. Then, the aluminum plate is washed twice with deionized water, the exposed black impurity layer is peeled off, and the aluminum plate is washed twice again with deionized water. An antenna groove having a trapezoidal cross-sectional structure in which the upper opening is larger than the lower opening of the antenna groove is obtained. The width of the upper opening is 2 mm, and the width of the lower opening is 0.8 mm.

  In step (8), the ink layer on the rear surface of the aluminum plate is removed with a chlorinated hydrocarbon solvent paint remover, the aluminum plate is washed twice with deionized water, and baked at 80 ° C. for 10 minutes.

  Step (9) fills the antenna groove with UV adhesive.

  In this example, the schematic cross-sectional structure of the aluminum shell after removing the ink layer and the hard anodized layer corresponding to the step pattern, the cross-sectional structure of the aluminum shell after removing a part of the aluminum layer to obtain a step Schematic drawing, aluminum groove slit radium engraved, schematic sectional view of the aluminum shell after removing the ink layer corresponding to the antenna groove slit, sectional schematic diagram of the aluminum shell after removing the ink layer, ink layer The schematic diagram of the cross-sectional structure of the aluminum shell after it is formed, the figure of the aluminum shell after the step pattern is radium engraved, the figure of the aluminum shell after the step is etched, the figure of the aluminum shell after the radium engraving of the antenna groove slit This is the same as the diagram shown in the first embodiment.

  The antenna groove formed on the aluminum shell according to this embodiment is not visible to the naked eye, does not impair the surface layer of the outer surface of the aluminum shell, and the outer surface of the aluminum shell is flat and beautiful. Maintains the cleanliness and continuity of the appearance of the phone and does not impair the metal texture of the entire phone body.

  The present embodiment describes an aluminum shell having an antenna groove of a tablet computer and a method for manufacturing the aluminum shell of the present disclosure.

  In the alkaline etching treatment in step (1), the series 5 aluminum layer 3 having a thickness of 0.5 mm is cut to form an aluminum plate having a size of 5 × 3.5 cm. Then, the aluminum plate is subjected to an alkaline etching treatment with a potassium hydroxide solution having a concentration of 60 g / L at 70 ° C. for 1 minute, and the aluminum plate is washed twice with deionized water.

  The smut removal treatment in step (2) is performed on the aluminum plate obtained in step (1) at 30 ° C. for 3 minutes and with a smut removal solution (200 mL of concentrated nitric acid with a concentration of 65 wt% per liter of the smut removal solution). The aluminum plate is washed twice with deionized water.

In the oxidation treatment in step (3), the aluminum plate obtained in step (2) is placed in an oxidation tank and hard oxidation treatment is performed. The hard oxidation treatment was performed for 30 minutes with a regular square wave pulse at 12 ° C., a duty ratio of 90%, a frequency of 1000 Hz, and a current density of 7 A / dm ² (120 g of sulfuric acid at 98 wt% per liter of oxidation solution, The aluminum plate is washed twice with deionized water.

  In the sealing treatment of step (4), the aluminum plate obtained in step (3) was sealed with a slight amount of nickel sealing material at 30 ° C. for 2 minutes, the aluminum plate was washed twice with deionized water, and aluminum The plate is dried with an oil-free compressed gas at 25 ° C. to obtain a hard anodized layer 1 having a thickness of 50 μm.

  In the ink spraying process of step (5), UV ink is sprayed onto the surface of the aluminum plate obtained in step (4) to form an ink layer 2 having a thickness of 60 μm, and the aluminum plate is baked at 120 ° C. for 20 minutes. Expose to ultraviolet light for 2 minutes.

  In step (6), the radium engraving is performed on the first surface of the aluminum plate obtained in step (5) by a radium engraving machine to remove the ink layer and the hard anodized layer corresponding to the step pattern. Then, the aluminum plate is etched at 30 ° C. for 40 minutes with an etching solution (the content of iron trichloride hexahydrate is 1000 g, the content of 37 wt% hydrochloric acid is 200 mL, and the other is water per 1 L of etching solution). Step 4 having a width of 2.5 cm and a depth of 0.35 mm is obtained by removing a portion (0.35 mm) of the aluminum layer in the thickness direction of the aluminum plate. Then, the aluminum plate is washed twice with deionized water, the exposed black impurity layer is peeled off, and the aluminum plate is washed twice again with deionized water.

  In step (7), UV ink is sprayed onto the step to form an ink layer having a thickness of 60 μm, and the aluminum plate is baked at 120 ° C. for 20 minutes and exposed to ultraviolet rays for 2 minutes. Then, the antenna groove slit having a width of 0.1 mm is engraved with radium in the step to remove the ink layer corresponding to the antenna groove slit, and the aluminum layer corresponding to the aluminum groove slit is removed by etching solution (etching) at 30 ° C. for 30 minutes. Etching is performed with 1 liter of iron trichloride hexahydrate content of 1000 g, 37 wt% hydrochloric acid content of 200 mL, and the remainder water. By observation, the inside of the hard anodized layer covered on the second surface of the aluminum plate is exposed. Then, the aluminum plate is washed twice with deionized water, the exposed black impurity layer is peeled off, and the aluminum plate is washed twice again with deionized water. An antenna groove having a trapezoidal cross-sectional structure in which the upper opening is larger than the lower opening of the antenna groove is obtained. The width of the upper opening is 2.5 mm, and the width of the lower opening is 1.0 mm.

  In step (8), the ink layer on the rear surface of the aluminum plate is removed with a chlorinated hydrocarbon solvent paint remover, the aluminum plate is washed twice with deionized water, and baked at 120 ° C. for 5 minutes.

  Step (9) fills the antenna groove with UV adhesive.

  In this example, the schematic cross-sectional structure of the aluminum shell after removing the ink layer and the hard anodized layer corresponding to the step pattern, the cross-sectional structure of the aluminum shell after removing a part of the aluminum layer to obtain a step Schematic drawing, aluminum groove slit radium engraved, schematic sectional view of the aluminum shell after removing the ink layer corresponding to the antenna groove slit, sectional schematic diagram of the aluminum shell after removing the ink layer, ink layer The schematic diagram of the cross-sectional structure of the aluminum shell after it is formed, the figure of the aluminum shell after the step pattern is radium engraved, the figure of the aluminum shell after the step is etched, the figure of the aluminum shell after the radium engraving of the antenna groove slit This is the same as the diagram shown in the first embodiment.

  The antenna groove formed on the aluminum shell according to this embodiment is not visible to the naked eye, does not impair the surface layer of the outer surface of the aluminum shell, and the outer surface of the aluminum shell is flat and beautiful. Maintains the cleanliness and continuity of the appearance of the phone and does not impair the metal texture of the entire phone body.

  The method of the example is similar to example 1 except for step (6), in which an aluminum plate is treated at 25 ° C. for 20 minutes and an etchant (containing iron trichloride hexahydrate per liter of etchant). Etching is performed with 900 g, the content of 37 wt% hydrochloric acid is 150 mL, and the other is water) to remove the aluminum layer portion (0.1 mm) in the thickness direction of the aluminum plate, thereby obtaining Step 4.

  In this example, the schematic cross-sectional structure of the aluminum shell after removing the ink layer and the hard anodized layer corresponding to the step pattern, the cross-sectional structure of the aluminum shell after removing a part of the aluminum layer to obtain a step Schematic drawing, aluminum groove slit radium engraved, schematic sectional view of the aluminum shell after removing the ink layer corresponding to the antenna groove slit, sectional schematic diagram of the aluminum shell after removing the ink layer, ink layer The schematic diagram of the cross-sectional structure of the aluminum shell after it is formed, the figure of the aluminum shell after the step pattern is radium engraved, the figure of the aluminum shell after the step is etched, the figure of the aluminum shell after the radium engraving of the antenna groove slit This is the same as the diagram shown in the first embodiment. The formed step is 2.5 cm wide and 0.1 mm deep, the upper opening of the aluminum groove is 5 mm wide, and the lower opening of the antenna groove is 1.4 mm wide.

  The antenna groove formed on the aluminum shell according to this embodiment is not visible to the naked eye, does not impair the surface layer of the outer surface of the aluminum shell, and the outer surface of the aluminum shell is flat and beautiful. Maintains the cleanliness and continuity of the appearance of the phone and does not impair the metal texture of the entire phone body.

  The method of the example is similar to example 1 except for step (6), in which the aluminum plate is treated at 25 ° C. for 15 minutes and the etchant (containing iron trichloride hexahydrate per liter of etchant). Etching is performed with 900 g, the content of 37 wt% hydrochloric acid is 150 mL, and the other is water, and the aluminum layer portion (0.05 mm) is removed in the thickness direction of the aluminum plate to obtain step 4.

  In this example, the schematic cross-sectional structure of the aluminum shell after removing the ink layer and the hard anodized layer corresponding to the step pattern, the cross-sectional structure of the aluminum shell after removing a part of the aluminum layer to obtain a step Schematic drawing, aluminum groove slit radium engraved, schematic sectional view of the aluminum shell after removing the ink layer corresponding to the antenna groove slit, sectional schematic diagram of the aluminum shell after removing the ink layer, ink layer The schematic diagram of the cross-sectional structure of the aluminum shell after it is formed, the figure of the aluminum shell after the step pattern is radium engraved, the figure of the aluminum shell after the step is etched, the figure of the aluminum shell after the radium engraving of the antenna groove slit This is the same as the diagram shown in the first embodiment. The formed step is 2.5 cm wide and 0.05 mm deep, the upper opening of the aluminum groove is 6 mm wide, and the lower opening of the antenna groove is 1.6 mm wide.

  The antenna groove formed on the aluminum shell according to this embodiment is not visible to the naked eye, does not impair the surface layer of the outer surface of the aluminum shell, and the outer surface of the aluminum shell is flat and beautiful. Maintains the cleanliness and continuity of the appearance of the phone and does not impair the metal texture of the entire phone body.

  One skilled in the art can appreciate that the tightness and hardness of the aluminum shell is better when the width of the upper opening of the antenna groove and the lower opening of the antenna groove is smaller. By comparing Example 1 with Examples 4 and 5, after removing a portion of the aluminum layer in step (6), the thickness of the remaining aluminum layer is about 20-40% of the total thickness of the aluminum layer. In this case, the widths of the upper and lower openings of the antenna groove formed after the etching are obviously reduced, and the rigidity and hardness of the aluminum shell can be effectively improved.

(Test example)
The aluminum shells obtained from Examples 1-5 were subjected to a signal shielding test. The test method was a radium engraving with two parts of an aluminum shell, each separated by an invisible antenna groove, to test the conductivity between the two conductive positions. All test results of Examples 1-5 showed non-conductivity between two conductive positions. Therefore, the cleanliness and continuity of the appearance of the electronic product metal cell are maintained, and the metal texture of the electronic product metal shell body is not impaired, and the signal shielding problem of the electronic product metal shell body is also solved.

  As described above, the embodiments have been described in detail. However, those skilled in the art will not be limited to the present disclosure, and various simple modifications may be made within the scope of the technical idea and the principle of the present disclosure. It can be envisaged that all these simple variations are within the scope of the present disclosure.

  In addition, the technical features described in the above-described embodiments are combined in an appropriate manner without contradiction, and various possible combinations are not described in this disclosure in order to avoid unnecessary repetition.

  Various embodiments of the present disclosure can also be combined without departing from the spirit and principle of the present disclosure, and it is understood that this is also the content of the present disclosure.

DESCRIPTION OF SYMBOLS 1 ......... Hard anodic oxidation layer 2 ......... Ink layer 3 ......... Metal layer, aluminum layer 4 ......... Step 5 ......... Antenna groove

Claims (14)

An electronic product metal shell having an antenna groove,
The electronic product metal shell has a metal layer and a hard anodized layer,
The hard anodized layer is covered on the surface of the metal layer;
A step is formed on the first surface of the electronic product metal shell;
The step passes through the hard anodized layer covered with the first surface of the metal layer in the thickness direction of the electronic product metal shell, and a part of the metal layer;
The antenna groove is disposed in the step and exposes the inside of the hard anodized layer that is covered on the second surface of the metal layer through the remaining portion of the metal layer in the thickness direction,
An electronic product metal shell, wherein a non-conductive material is filled in the antenna groove. The step has a width of 1 . 0-5.0 cm and depth 0 . The electronic product metal shell according to claim 1, further comprising a recess of 1 to 0.8 mm. The opening of the antenna groove facing the first surface of the metal shell of the electronic product is defined as an upper opening, and the antenna groove has a trapezoidal cross-sectional structure in which the upper opening is larger than the lower opening of the antenna groove, The upper opening has a width of 2 to 5 mm, and the lower opening has a width of 0 . The electronic product metal shell according to claim 1, wherein the metal shell is 8 to 1.4 mm. The metal layer has a thickness of 0 . 5 to 1.5 mm, and the thickness of the hard anodized layer is 0 . The electronic product metal shell according to any one of claims 1 to 3, wherein the metal shell has a thickness of 02 to 0.06 mm. (1) The metal layer is subjected to a hard anodizing treatment and an ink spraying treatment in order to form a hard anodized layer and an ink layer,
(2) Step (1) Step is formed on the first surface of the resulting product after the antenna groove formed in said step, said step is step (1) manufactured before Symbol obtained after The hard anodized layer covered by the first surface of the metal layer in the thickness direction of the product and a part of the metal layer, and the antenna groove is the remaining portion of the metal layer in the thickness direction. Exposing the inside of the hard anodized layer that passes through and is covered on the second surface of the metal layer;
(3) Step (2) the ink layer is removed in the resulting products after, electronic products metal shell having an antenna groove, characterized by the step of filling the non-conductive material to the antenna groove Production method. In step (2), forming the step, the step pattern is formed on the first face of the front Symbol products obtained after step (1), the ink layer corresponding to the step pattern and the The method according to claim 5, wherein the step is obtained by removing a hard anodized layer and removing a part of the metal layer in a thickness direction of the metal layer. After removing a portion of the metal layer, The method of claim 6 in which the thickness of the remaining portions of said metallic layer is characterized by a 2 0 to 80% of the total thickness of the metal layer. The portion of the metal layer, the said metal layer by etching is removed in the thickness direction, the etching is 4 0-50 minutes at a temperature of 2 0 to 30 ° C., per 1L, the content of ferric chloride 8 00～1000G, and the content of hydrochloric acid is 3 5～75G, the method according to claim 6, characterized in that it is carried out with an etching solution having an aqueous solution having a ferric chloride and hydrochloric acid.   In step (2), the formation of the antenna groove in the step is performed by spraying ink on the step, forming an antenna groove slit in the step to remove the ink corresponding to the antenna groove slit, The metal layer corresponding to an antenna groove slit is removed to expose the inner side of the hard anodized layer covered on the second surface of the metal layer. The method described in 1. Spraying of ink by blowing UV ink to form an ink layer having a thickness of 3 0~60μm, 2 0~30 minutes baked at 1 10 to 120 ° C., 1 to 2 minutes, and wherein the exposure to ultraviolet The method of claim 9. The formed antenna groove slit has a width of 0 . The method according to claim 9, wherein the method is 02 to 0.1 mm. The metal layer corresponding to the antenna groove slit is removed by etching, the etching is performed at a temperature of 20-30 ° C. for 40-50 minutes, and the content of iron trichloride is 800-1000 g per liter, and the content of hydrochloric acid is 3 5~75g, the method according to claim 9, characterized in that it is carried out with an etching solution having an aqueous solution having a ferric chloride and hydrochloric acid.   In step (1), the hard anodizing treatment is performed by sequentially performing an alkaline etching treatment, a smut removal treatment, an oxidation treatment and a sealing treatment on the metal layer, and the alkaline etching treatment, the smut removal treatment, the oxidation treatment, and the The method according to claim 5, wherein cleaning is performed after each sealing treatment. In step (1), said ink spraying process, by spraying UV ink to form an ink layer having a thickness of 4 0~60μm, 2 0~30 minutes baked at 1 10 to 120 ° C., 1 to 2 minutes, UV The method according to claim 5, wherein exposure is performed.